Design And Implementation Of Multi-channel Radar Signal Processing Based On DSP

The signal processing technology involved in radar systems usually has the characteristics of large data volume,large amount of repeated operations,complex task processing,real-time processing,etc.,which puts high demands on the computing power,computing speed and data processing capability of the radar signal processing system.Claim.Based on the engineering practice,this paper designs a parallel implementation scheme of multi-channel radar signal processing system based on multi-core DSP.This paper first introduces the signal processing flow of the system,expounds the principle and design of each functional module of the system,and analyzes the design methods of digital beamforming,digital down conversion,FIR filtering and the implementation of pulse compression and MTD signal processing theory in detail.And carry out MATLAB simulation on each function module of the system,which provides a theoretical basis for the realization of subsequent functional modules.Secondly,the overall scheme of the multi-channel radar signal processing system is given in combination with the engineering practice.The DSPC-8681 hardware platform implemented by the signal processing system is summarized,and the data transmission of the Ethernet interface of the host computer and DSP is analyzed.test.At the same time,a solution based on TMS320C6678 DSP for 7-core multi-channel radar signal processing is designed,in which core 0 is used as the main control core,which is responsible for data transmission and processing and data processing flow control;core 0 and core 1~core 4 realize 12-channel digital Beamforming processing;core 5,core 6 achieve single-beam digital down conversion,FIR filtering processing and pulse compression,MTD signal processing.Then,according to the design scheme of each processing module of the system,the software design and implementation steps of digital beamforming,digital down conversion,pulse compression and MTD on DSP are expounded step by step.In the process of processing the signal data matrix,the data matrix is moved and transposed using EDMA3,and the data matrix is moved to the secondary cache L2 for processing,which speeds up the processing.Finally,the paper also discusses the multi-core communication,multi-core synchronization,Cache consistency and program optimization of multi-core DSP,and analyzes the time of multi-core processing to meet the real-time requirements.In this paper,the processing modules and algorithm modules of the system are debuggedand verified,and the processing results are compared with the MATLAB simulation results to verify the correctness of the signal processing system design.